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Pasture‐use patterns on dairy and beef farms in the natal midlands
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C.A.H. Heard --- , N.M. Tainton --- Department of Grassland Science, P.J. Edwards --- Late of Department of Agriculture (Natal Region),Pasture sites for each of the species grown are classified for both dryland and irrigated pastures in the Natal Midlands. Only six species viz. kikuyu, Italian ryegrass, Eragrostis curvula, Festuca arundinacea (tall fescue), Dactylis glomerata (cocksfoot) and Trifolium repens (white... -
The rate of leaf emergence and decay as criteria for optimising the grazing rotation in semi‐arid grassveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.E. Danckwerts --- Department of Agriculture (Eastern Cape Region), A.J. Aucamp --- Department of Agriculture (Eastern Cape Region),The dymasnics of leaf emergence, longevity and abscission were investigated in two key grasses, Themeda triandra and Sporobolus fimbriatus in semi‐arid grassveld in the Eastern Cape. Where there was no moisture stress, new leaves emerged on filters‐every two to three... -
Patrone van opkoms van sekere onkruide in veldtoestande
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. E.J du Toit --- , Republiek van Suid-Afrika M.R. Le Court De Billot --- , Republiek van Suid-AfrikaOpkomspatrone van 24 onkruidspesies, wat algemeen in bewerkte lande in somerreënvalgebiede voorkom, is ondersoek. Saad van onkruidspesies is gedurende die vorige herfs in die veld versamel. Een duisend sade van elk van die onkruide is ewekansig gekies uit die versamelde... -
Germination strategies of Strandveld Succulent Karoo plant species for revegetation purposes: III Effect of relative humidity and storage site on seed viability
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.J. de Villiers --- Department of Botany, Republic of South Africa M.W. van Rooyen --- Department of Botany, Republic of South Africa G.K. Theron --- Department of Botany, Republic of South AfricaChanges in seed viability owing to fluctuations in environmental conditions (temperature and relative humidity) are crucial factors to consider during post-mining revegetation efforts in the Strandveld Succulent Karoo. The effect of relative humidity and storage site on seed viability was... -
Soil seed bank evaluation and seedling establishment along a degradation gradient in a semi-arid rangeland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: HA SnymanThe effects of rangeland degradation on the size and species composition of the seed bank and seedling establishment in the field were quantified over a two year period (2000–2001 and 2001–2002 growing seasons). Soil seed bank sampling was carried out... -
Micro‐site influence on seed longevity and seedling emergence of a bunchgrass (Themeda triandra) in a semi‐arid savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T.G. O'Connor --- Department of Range and Forage Resources, Republic of South AfricaThe influence of micro‐site (shaded, exposed, buried) on the seed longevity and seedling emergence of Themeda triandra was tested using experimental seed banks. Deep shade considerably reduced soil surface temperature. Seeds did not persist in any micro‐site for longer than... -
Aspects of the seed ecology of Acacia karroo in the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: TG O’Connor --- , South Africa CH de Ridder --- , South Africa FO Hobson --- , South AfricaSeed ecology may play a role in the widespread increase of Acacia karroo in savanna and grassland. Accordingly, fecundity, predation, mortality by fire, dispersal by livestock, and seed longevity were studied. Seed production per tree (P of pod production, pods... -
Longevity of the Seychelles Fody Foudia sechellarum
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: H Dieter Oschadleus --- Animal Demography Unit, Department of Zoology, South Africa Riaz Aumeeruddy --- Nature Seychelles, Seychelles SjoukeA Kingma --- School of Biological Sciences, UKThe Seychelles Fody Foudia sechellarum, which occurs on six islands in the Seychelles, has been well ringed over several decades in order to obtain population estimates for the species, and morphological descriptions and measurements. Annual survival estimates for the species... -
The Oldest Known Banded Wandering Albatross Diomedea Exulans at the Prince Edward Islands
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J. Cooper H. Battam C. Loves P. J. Milburn L. E. SmithThe oldest known wandering albatross Diomedea exulans at the Prince Edward Islands is estimated to have been approximately half a century old when last recaptured in 2001. Demographic studies need to continue for several more decades before the true maximum... -
Population dynamics of the seabob shrimp Xiphopenaeus kroyeri (Dendrobranchiata, Penaeidae) in south-eastern Brazil
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: GS Heckler --- Departamento de Ecologia, Instituto de Biociências, Brazil SM Simões --- LABCAM (Laboratório de Biologia de Camarões Marinhos e de Água Doce), Departamento de Ciências Biológicas, Faculdade de Ciências, Brazil APF Santos --- LABCAM (Laboratório de Biologia de Camarões Marinhos e de Água Doce), Departamento de Ciências Biológicas, Faculdade de Ciências, Brazil A Fransozo --- Departamento de Zoologia, Instituto de Biociências, Brazil RC Costa --- LABCAM (Laboratório de Biologia de Camarões Marinhos e de Água Doce), Departamento de Ciências Biológicas, Faculdade de Ciências, BrazilThe population dynamics, including the sex ratio, reproductive period, individual growth and longevity, and population structure of the shrimp Xiphopenaeus kroyeri, are described. The shrimps were collected monthly from July 2005 to June 2007 at four sites in Ubatuba Bay,... -
Mortality patterns among type 2 diabetes mellitus patients in Ilorin, Nigeria
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: A Chijioke --- Department of Medicine, Nigeria AN Adamu --- Department of Medicine, Nigeria AM Makusidi --- Department of Medicine, NigeriaObjective: People living with diabetes mellitus (DM) are prone to varied forms of complications which often lead to their premature death. The vulnerability has the greatest impact in type 2 DM because of larger numerical strength, insidious onset and late... -
Variations in moult, morphology, movement and survival rates of the Sombre Greenbul Andropadus importunus within southern Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Bo T Bonnevie --- Information Technology Division, South AfricaRinging data from the South African bird ringing unit, SAFRING, were analysed to explore variations and trends in population parameters of the Sombre Greenbul Andropadus importunus in southern Africa. Adult and juvenile body mass increased southwards, whereas the relative sizes... -
The long-lived queen: reproduction and longevity in female eusocial Damaraland mole-rats (Fukomys damarensis)
Item type: Journal Article • Journal: African Zoology • Authors: Christina M. Schmidt --- Department of Zoology and Entomology, South Africa Jennifer U. M. Jarvis --- Department of Zoology, South Africa Nigel C. Bennett --- Department of Zoology and Entomology, South AfricaThe inverse relationship between reproduction and lifespan is one of the main concepts of life history theory. This association has been observed in most taxa, although exceptions have been found in which a breeding female outlives her non-reproductive cohorts. This... -
Life-history characteristics of an age-validated established invasive African sharptooth catfish, Clarias gariepinus, population in a warm–temperate African impoundment
Item type: Journal Article • Journal: African Zoology • Authors: Reece Wartenberg --- Department of Ichthyology and Fisheries Science, South Africa Olaf L. F. Weyl --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa Anthony J. Booth --- Department of Ichthyology and Fisheries Science, South Africa Henning Winker --- University of Cape Town, South AfricaIt has been suggested that the invasive, omnivorous Clarias garipienus is capable of rapid invasions and long-term persistence in recently inhabited freshwater systems. To test this hypothesis, the life history of the established, extralimital Darlington Dam (33°10’31”S, 25°09’13”E) population was... -
Growth and longevity of Exosphaeroma hylocoetes (Isopoda) under varying conditions of salinity and temperature
Item type: Journal Article • Journal: African Zoology • Authors: T.O. Henninger --- Department of Zoology and Entomology, South Africa P.W. Froneman --- Department of Zoology and Entomology, South Africa A.J. Booth --- Department of Ichthyology and Fisheries Science, South Africa A.N. Hodgson --- Department of Zoology and Entomology, South AfricaThe effect of temperature (15 and 25°C) and salinity (15 and 35 practical salinity units) combinations on the growth and longevity of the South African estuarine isopod Exosphaeroma hylocoetes was investigated and data analysed using the logistic growth model. No... -
Longevity and survival of the Endangered Seychelles Magpie Robin Copsychus sechellarum
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Julie Gane --- Cousine Island, Seychelles April Burt --- Nature Seychelles, SeychellesThe Seychelles Magpie Robin Copsychus sechellarum was once one of the most threatened birds in the world, but was downgraded from Critically Endangered to Endangered after a long-term recovery programme was success- fully implemented. Comprehensive long-term monitoring of this species... -
Are 20th-century recommendations for growth and height correct? A review
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Tt Samaras [AN0001]Findings supporting the counter-intuitive thesis that smaller body size promotes greater health and longevity are reviewed. In addition, the risks of promoting further growth through genetic manipulation are explored in relation to chronic disease and longevity. Supporting examples from animal... -
Longevity of SMMEs in Soweto: Does marketing play a role?
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: J. W. Strydom --- Department of Business Management, South AfricaSmall businesses in South Africa are in a fight for survival. Fewer than 50% of all SMMEs survive for more than five years, this while government sees itself as the saviour and growth engine for creating jobs in the country... -
Survival estimates for the greater crested tern Thalasseus bergii in southern Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Payo-Payo --- Group of Ecology and Animal Demography (GEDA), Spain A Sanz-Aguilar --- Group of Ecology and Animal Demography (GEDA), Spain D Gaglio --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa RB Sherley --- Environment and Sustainability Institute, University of Exeter, United Kingdom TR Cook --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa R Altwegg --- Statistics in Ecology, Environment and Conservation, Department of Statistical Sciences, and African Climate and Development Initiative, South Africa PG Ryan --- Percy FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South AfricaThe nominate race of the greater crested tern Thalasseus bergii breeds only along the coast of the Benguela region (west coast) of southern Africa, where its population is increasing, in contrast to other species of breeding seabirds in the region... -
Longevity summary from 69 years of Estrildidae ringing data in southern Africa
Item type: Journal Article • Journal: African Zoology • Authors: Sanjo Rose --- Animal Demography Unit, Department of Biological Sciences, South Africa H Dieter Oschadleus --- Animal Demography Unit, Department of Biological Sciences, South AfricaThis study focuses on the longevity data accumulated for the family Estrildidae, specifically exploring longevity records for each species using ringing data. Longevity is the minimum age reached by an individual as determined by the time elapsed between initial ringing... -
Longevity in some Malagasy rainforest passerines
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Friederike Woog --- Staatliches Museum für Naturkunde Stuttgart, Germany Narisoa Ramanitra --- Ecole Normale Supérieure, Université d’Antananarivo, Madagascar Andrianarivelosoa Solohery Rasamison --- Mention Zoologie et Biodiversité Animale, Faculté des Sciences, L’Université d’Antananarivo, Madagascar Rasolondraibe Lovahasina Tahiry --- Mention Zoologie et Biodiversité Animale, Faculté des Sciences, L’Université d’Antananarivo, MadagascarData on longevity is a prerequisite to understand the life-history strategies of a species. For Malagasy songbirds no information has been previously published. Therefore, we studied their longevity in a capture–recapture effort in a rainforest in eastern Madagascar (Maromizaha, Andasibe)... -
Life history, distribution and seasonal movements of a threatened South African endemic seabream, Chrysoblephus gibbiceps
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CG Attwood --- Department of Biological Sciences and the Marine Research Institute, South Africa ME Dawson --- Department of Biological Sciences and the Marine Research Institute, South Africa SE Kerwath --- Department of Biological Sciences and the Marine Research Institute, South Africa C Wilke --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South AfricaThe red stumpnose Chrysoblephus gibbiceps (Sparidae) is a South African endemic seabream that has been severely depleted by fishing. A total of 678 C. gibbiceps were sampled by line and trawl fishing for a study of their morphology, age, growth,... -
Life-history trade-offs among four sympatric seabreams
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CG Attwood --- , South Africa HAM Ensair --- , South AfricaFish life history is shaped by environmental and ecological circumstances but constrained by phylogeny. Life-history trade-offs can be exposed in a comparison of closely related species with similar niches. We compare the life histories of four closely related and similar-sized,... -
Philoxenia — the DNA of hospitality: hype or cure?
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Peter A. Singleton --- NHL Stenden University of Applied Sciences, The NetherlandsPhiloxenia is the ancient Greek custom or tradition of treating a stranger as a friend, but it goes much deeper in terms of its reality and consequences. This custom sits deep in Greek culture and mythology, where its layers of... -
Movement and growth of the spotted gully shark Triakis megalopterus in South African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: BQ Mann --- Oceanographic Research Institute (ORI), South Africa GL Jordaan --- Oceanographic Research Institute (ORI), South Africa WN Dalton --- Oceanographic Research Institute (ORI), South Africa R Daly --- Oceanographic Research Institute (ORI), South Africa M Soekoe --- Reel Science Coalition, South Africa WM Potts --- Rhodes University, South Africa MJ Smale --- Zoology Department and Institute for Coastal and Marine Research, Nelson Mandela University, South Africa L Swart --- Fisheries and the Environment (DFFE), South AfricaThe movement and growth of spotted gully sharks Triakis megalopterus (family Triakidae) along the coast of South Africa were investigated using external dart tagging. Of a total of 7 211 sharks tagged, 657 (9.1%) were recaptured over a 37-year period,... -
Why traditional diets are more relevant than ever today
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Karen Cheryl Morris --- Naturopath, South Africa Thandi Puoane --- University of the Western Cape, SAThe current epidemic of obesity and its co-morbidities reflect an urgent need to reform our modern eating patterns. This commentary proposes the reclamation of our traditional diets of the precolonial, preindustrial era, which are argued to be more sustainable, in...